thanks Guys for your information,
indeed you're all quit right,
but I think I've not correctly described my problem :-(
I need to have 2 (or more) names, that references the same instance of
an object,
and in assigning a value to the object (or to some property in the object),
I need to do extra activities (like changing some global variables).
Now if I use a "container type object", without actual using the index
of the container object,
I get things working OK.
But now I have to use a dummy index, if I use the object in assignments,
see program below.
Is there another way, without using the dummy index, to achieve the same
results ?
thanks,
Stef Mientki
<Python>
class cpu_ports(object):
def __init__(self, value=0):
self._d = value
def __setitem__(self, index, value):
print 'vv'
self._d = value
def __getitem__(self, index):
return self._d
def __repr__(self):
return str(self._d)
name1 = cpu_ports() # create an instance
name2 = name1 # refer with a second name to the same instance
print name1, name2 # test ok
name1[0] = 25 # assign a value to the instance
print name1, name2 # both references are OK
name2[0] = 26 # assign another value through the other name
print name1, name2 # both reference are OK
name2[0] = name1[0] + 13 # use both names at either side of an assignment
print name1, name2 # both references still OK
</Python>
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